{"id":67605,"date":"2018-03-09T22:56:03","date_gmt":"2018-03-09T22:56:03","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/estudio-geomorfologico-y-de-paleoambientes-holocenos-en-la-region-de-adwa-tigray-norte-de-etiopa%c2%ada\/"},"modified":"2018-03-09T22:56:03","modified_gmt":"2018-03-09T22:56:03","slug":"estudio-geomorfologico-y-de-paleoambientes-holocenos-en-la-region-de-adwa-tigray-norte-de-etiopa%c2%ada","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/estudio-geomorfologico-y-de-paleoambientes-holocenos-en-la-region-de-adwa-tigray-norte-de-etiopa%c2%ada\/","title":{"rendered":"Estudio geomorfol\u00f3gico y de paleoambientes holocenos en la regi\u00f3n de adwa, tigray, norte de etiop\u00eda."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Mar\u00eda  Jos\u00e9 Gomes Machado <\/strong><\/h2>\n<p>En las \u00faltimas d\u00e9cadas, diversas organizaciones e instituciones internacionales han puesto en evidencia las alarmantes tasas de erosi\u00f3n y degradaci\u00f3n de los suelos existentes en diversas regiones de etiop\u00eda. Este incremento parece presentar una fuert e relaci\u00f3n con el aumento de la presi\u00f3n antr\u00f3pica sobre el medio, principalmente debida al cultivo indiscriminado, sobrepastoreo y deforestaci\u00f3n de \u00e1reas marginales. A este factor se debe a\u00f1adir otro de igual importancia relacionado con la aparente d isminuci\u00f3n y mayor variabilidad interanual de las precipitaciones. el inter\u00e9s del estudio de la din\u00e1mica erosiva en la regi\u00f3n de adwa se ve reforzado por la importancia etnobot\u00e1nica y arqueol\u00f3gica del \u00e1rea, localizada en el norte de etiop\u00eda (provinci a del tigray). Esta \u00e1rea se considera la cuna de la cultura et\u00edope habiendo sido el escenario de la domesticaci\u00f3n de cereales, y de una intensa ocupaci\u00f3n agr\u00edcola desde hace m\u00e1s dos milenios. a lo largo del presente trabajo se han abordado tres aspec tos principales relacionados con la degradaci\u00f3n del suelo en el norte de etiop\u00eda: i) el estudio de la tipolog\u00eda de los procesos de degradaci\u00f3n de los suelos y sus condicionantes naturales y antr\u00f3picas; ii) el grado de resistencia y resiliencia del si stema, a partir de datos cuantitativos (cuantificaci\u00f3n de la p\u00e9rdida de suelo a partir de datos experimentales y mediciones directas en campo), estratigr\u00e1ficos y socio-antropol\u00f3gicos; iii) identificaci\u00f3n y descripci\u00f3n de los principales per\u00edodos de d egradaci\u00f3n y estabilidad ambiental, a escala regional, tanto en laderas como en valles acaecidos durante el holoceno, con especial hincapi\u00e9 en los \u00faltimos 4 milenios. Asimismo se apuntan los principales factores desencadenantes de los procesos de deg radaci\u00f3n, durante estos periodos; en el estudio se han integrado registros geomorfol\u00f3gicos (procesos erosivos, cuantificaci\u00f3n de tasas de erosi\u00f3n), sedimentol\u00f3gicos (facies sedimentarias, mineralog\u00eda), geocronol\u00f3gicas, paleoecol\u00f3gicos (identificaci\u00f3n  y estudio de fitolitos en sedimentos), geoarqueol\u00f3gicos y antr\u00f3picos.   palabras clave: degradaci\u00f3n del suelo, fitolitos, este de \u00e1frica, cuaternario, cambio global, agricultura,  abstract: during the last decades, a significant number of internatio nal institutions and organisations have enlightened the alarming soil loss rates and soil degradation affected areas experienced by different areas in ethiopia. There seems to be a strong correlation between this increase in soil loss and the increas<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Estudio geomorfol\u00f3gico y de paleoambientes holocenos en la regi\u00f3n de adwa, tigray, norte de etiop\u00eda.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Estudio geomorfol\u00f3gico y de paleoambientes holocenos en la regi\u00f3n de adwa, tigray, norte de etiop\u00eda. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Mar\u00eda  Jos\u00e9 Gomes Machado <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Complutense de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 24\/10\/2008<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Alfredo Perez Gonzalez<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: julio Mu\u00f1oz jimenez <\/li>\n<li>ascension Pinilla navarro (vocal)<\/li>\n<li>mateo Guti\u00e9rrez elorza (vocal)<\/li>\n<li>Francisco Lopez bermudez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Mar\u00eda Jos\u00e9 Gomes Machado En las \u00faltimas d\u00e9cadas, diversas organizaciones e instituciones internacionales han puesto en evidencia [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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